Door for horizontal oven chambers



Aug. 9, 1938. w. BEIMANN DOOR FOR HORIZONTAL OVEN CHAMBERS IE 3Sheets-Sheet 1 Filed Jan. 20, 1954 & I an INVENTO .LAQA. BY

ATTORNEY 9, 1938. W. BEIMANN 2 3 DOOR FOR HORIZONTAL OVEN CHAMBERS FiledJan. 20, 1954 SSheets-Sheet 2 INVENTO mama. W

ATTORNEY Patented Aug. '9, 1938 UNITED STATES PATENT OFFICE DOOR FORHORIZONTAL OVENCHAMIBERS man company Application January 20, 1934,Serial No. 707,454

a In Germany January 7, 1933 Claims.

The present invention comprises improvements in a door of known type,commonly called a self sealing door, for closing the doorway at the endof a horizontal oven chamber, and particularly an oven chamber for theproduction of gas and coke. The door of the type improved, comprises anouter metallic doorsection or portion provided at its edge withadjustable packing or sealing means for engaging and making a gas-tightjoint with the door frame portion of the oven structure, and comprisesan inner or plug section or portion of refractory and good heatinsulating material which is adapted to take, absorb, or maintain withinitself, a substantial portion of the difference or temperature dropbetween the temperature in the interior of the oven chamber and theoutside air temperature,

7 and thereby assist in preventing the! temperature of the outermetallic door parts from becoming excessively high. The weight of theinner or plug portion of such adoor is rather high, so that the metallicouter door portion must provide or include a supporting frame which isstrong and rigid, but thepacking or sealing means portion of the outerdoor section must be flexible and capable of adjustment to accommodatethe warping of the door body and of the oven structure door frame, whichis an unavoidable result of the conditions of use.

The primary object of the invention is to improve a door of the abovementioned type so as to secure the following advantageous conditions orfeatures, namely:

A total door weight which is as small as is practically possible; a doorconstruction in which the refractory liner or plug portion of the door,as well as the sealing means, has a certain capacity foryielding orgiving way along the full height of the door to accommodate the warpingof the adjacent portion of the oven structure; and an inner refractoryor plug portion of the door having the best practically possible heatinsulating effect so that the outer heat radiating surfaces of the dooras well as its sealing means may remain sufficiently cool. I

One of the chief expedients employed in accordance with, and for theattainment of the primary object of the invention, consists in an innerdoor or plug section construction which omits the usual heavy ironsupporting or clamping members extending along the. full length orheight of the door and serving to hold the re- .fractory plug sectionmasonry in place, and includes in lieu thereof, one or more verticalmetallic bars which pass through the individual super- .latter remotefrom the other bar.

pressure screws, mounted on the supporting posed sections of therefractory masonry and hold the latter together.

To avoid objectionable bending of the said vertical bars and to maintainthe refractory material of the plug section in suitable spaced relationwith the metallic outer door portion, metallic parts are fixed to thelast mentioned portion of the door at spaced points along the length ofthe latter, and extend into the plugsection of the door between thesuperposed individual sections of the masonry and into embracingrelation with each such vertical bar. The said superposed masonrysections of the plug portion of the door rest on one another, thelowermost section being directly supported by a base plate fixed to themetallic outer portion of the door. Said base plate and the refractorymaterial above it are supported by the metallic outer portion of thedoor, however, only when the door is withdrawn from the doorway, since,when the door is in its normal position in the doorway, the base platerests on the floor of the corresponding oven chamber. v

In one preferred embodiment of the invention, the metallic outer doorportion comprises a supporting frame and an elastic or flexible metallicplate which is interposed between said frame and the inner or plugsection of the door and which carries packing or sealing means at itsedge, and which is hinge connected to the supporting frame at the top ofthe door. The said supporting frame consists; as shown in theaccompanying drawings, of two vertical metal bars of channel bar, or Ushape, cross section, which are interconnected by transverse frame ribs,the

flanges of each such bar being at the side of the Adjustable frame atintervals along the length or height of the door, act'on the flexibleplate at the edge of the latter to hold the said sealing means carriedby the plate, in abutting relation with the door frame member.

In another embodimentof the invention, the supporting frame is formed bya rigid plate the edge of which is bent outwardly. This rigid plate mayhave strengthening ribs including transverse ribs wherein the door boltsor looking bars are mounted. In this embodiment an elastic or flexibleframe is employed in lieu of the flexible plate employed in the firstmentioned embodiment. i Said flexible frame carries sealing or packingmeans at its outer margin and is clamped between the rigid plate and therefractory plug.

Holders for the presser screws, by which the door frame.

packing or sealing means are adjusted or tightened, are mounted on theouter edge of the rigid plate.

Further characteristic-features and details of the invention will bedescribed hereinafter with reference to the accompanying drawings whichshow, by way of example, the two above mentioned embodiments of theinvention, and in which:

Figure 1 is a front view of a door forming the first abovementionedembodiment of the invention;

Figure 2 is a vertical longitudinal section on the line II-II of Figure1;

Figure 3 is a horizontal section on line III-III of Figure 2;

Figure 3a is a partial section taken similarly to Figure 3, and shows amodified form of the metallic parts which embrace the vertical bars;

Figure 4 is a vertical section on line IV-IV of Figure 2;

Figure 5 is a vertical longitudinal section of a door forming the secondabove mentioned embodiment of the invention; and

Figure 6 is a horizontal section on line V'I-VI of Figure 5.

In the door embodiment shown in Figures 14, the outer supporting frameportion of the door consists of main metallic members I, of U shape orchannel bar section, which are interconnected by transverse portionsformed with threaded bores in which screws 3 are screwed. A transversedoor bolt or latching bar 4 is rotatably mounted on each of the screws3. The latching bars 4 are interconnected by rod 6, and are adapted toengage hooks 5 fixed to the door frame 9 of the oven chamber, so that byturning the screws 3, the door may be firmly pressed against said Aflexible metal plate I at the inner side of the supporting frame portionof the door carries at its edge a sealing means 8, which is adapted toabut against a machined face of the door frame 9. The plate I isprovided at its outer side adjacent its upper end with bored lugs or eyeparts I0 respectively. alongside corresponding apertured lugs or eyeparts ll carried by the main supporting frame members I. A horizontalbolt or bolts l2 passing through the apertures in the lug or eye partsI!) and II, cooperate with the latter to provide a hinge connectionthrough which the metal plate 'l is suspended from the supporting framemembers I. The plate I also has fixed to its outer side horizontalmetallic strengthening ribs l3 of channel bar cross section, the ends ofwhich are acted upon by presser screws I 4. The latter are threadedthrough threaded passages or bores provided in the supporting framemembers I, and in flat eye or pad parts l5 fixed thereto. When the doorsupporting frame is in its normal position relative to the door frame 9,as shown in Figs. 3 and 4, the sealing means 8 carried by, and at theedge of the flexible metal plate 1, may be firmly pressed against thefixed door frame 9 of the oven chamber by.

Two vertical bars 2| pass through each of the sections 19 of therefractory plug, and through holes provided therefor in the plates 20,and thus interconnect the plug parts, and maintain the plug orrefractory portion of the door at the permanent required uniformdistance from the flexible metal plate 1. The sheet metal plates 20 arefixed to portions of the plate I alongside which the strengthening ribsl3 are located.

The connection between the plug bars 2| and the outer door may beeffected, also, by holders differing in construction from the plates 20,such for example as illustrated in Figure 3a, wherein the holders areformed by flat iron hooks 22 which engage the vertical bars 2|.

As shown in Figs. 1 and 2, the door'is provided with an opening at itstop, which serves for the introduction of the levelling bar and normallyis closed by a cover 23.

In the closed position of the door shown in Figs. 3 and 4, the flexibleplate 1 extends across the door opening and .has its marginal portionprojecting laterally away from the top and bottom and vertical sides ofthe refractory plug section of the door and overlapping the machinedface, or sealing surface, of the stationary door frame member 9. Thesealing means 8, as shown, constitutes a rectangular frame attached tothe marginal portion of the plate I and surrounding the plug section ofthe door, said frame being formed of metal of angle bar cross sectionhaving one flange extending away from the plate 1 with its free edge insealing engage ment with the sealing surface of the door frame member 9,in the closed position of the door.

In the embodiment illustrated in Figures 5 and 6, the supporting bodyportion of the door is an integral cast metal piece which comprises arigid plate 24', situated in front of the charge in the oven chamber,and which is provided with narrow strengthening ribs 25, strongtransverse ribs 26, and eyes or apertures 21 in which presser screws 38are threaded. Door bolts or latching bars 28 are mounted on thetransverse ribs 26 and are adapted to engage hooks 30 fixed to the flxeddoor frame 29. In this embodiment, also, the refractory plug portion ofthe door is composed of individual sections 3| which are held togetherby vertical bars 32, the whole plug portion of the door resting on abase plate 33 fixed to the rigid cast plate 24. As shown in Fig. 5, theplug bars 32 are in the form of bolts threaded at one end, and engagingand extending between the base plate 33 and an upper holder 34. The

latter as well as flat intermediate hooks or holders 35, are fixed tothe plate 24.

The flexible frame, previously referred to as clamped between the rigidouter door plate and refractory plug portions of the door, is designatedin Fig. 6 by the symbol 36, and is there shown as mounted on and clampedagainst the rigid plate 24. At its edge the frame 36 carriesv packing orsealing means 31 which engages with the fixed or stationary door frame29 and cooperates with the latter in making a gas tight joint. Thepreviously mentioned screws or bolts 38, adjustably mounted in the lugsor eyes 21, firmly press the flexible frame 36 with its sealing means 31against the door frame 29. As shown in Figs. 5 and 6, the sealing means31 is a rectangular frame of angle bar cross sec-' tion with the freeedge of one flange or blade adapted to engage the sealing surface of thedoor frame 29, as in the case of previously described Sealing means 8,and the sealing framepart 36 is a rectangular frame-like body of sheetmetal forming a flexible resilient metal web connecting the sealingmeans 31 to the rigid portion of the door structure.

Both door embodiments illustrated possess common characteristic andsignificant features, in that neither embodiment includes metallic partshaving a largesurface in contact with the hot oven chamber charge, orincludes parts providing a good heat conducting path in the horizontaldirection through the door to the outer sideof the latter. Except forthe lower plug supporting base plates l8 and 33 shown in Figs. 2 and 5,respectively, no metallic part of either door embodiment comes intocontact with the oven charge. Neither the plug holding plates 20 shownin Fig. 3, nor other holding members, such as the fiat hooks 22 shown inFig. 3a, engaging the vertical plug bars, extend to the front surface ofthe plug. In consequence, the temperature of the outer metallic doorsurfaces are only slightly in excess of the outside air temperature andthe heat losses due to radiation are thus kept relatively small.Furthermore, witheach door embodiment, the metallic sealing flange isnot heated by heat conduction to an extent suflicient to causenoticeable leakage or soiling of the sealing parts by the depositthereon of condensed distillates. 4

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A door for an oven producing coke or gas, consisting of an outer doorsection comprising a rigid door plate, and a refractory liner carried bya holder connected to said door plate, said plate having at the rimthereof a packing frame in the form of a blade which is connected to thedoor by a resilient metal web and bears with its edge againstthe doorframe and said web being connected to said plate by clamping it betweensaid plate and holder.

2. In a self sealing plug door for a horizontal oven chamber, thecombination of a rigid metallic outer door section, a refractory innerplug section, metallic plug section holding means secured to the innerside of said rigid outer section, and sealing means comprising aflexible metallic web portion clamped between said rigid outer sectionand holding means, and a metallic sealing blade portion connected tosaid web portion at the outer edge of the latter extending away from theinner side of said web portion alongside the outer portion of the edgeof said plug section.

3. A plug door for a horizontal oven chamber with a door opening and asealing surface at the margin of said opening, said door comprising aninner plug section of refractory material, an

intermediate sealing section and a rigid outer section forming a supportfor said inner and intermediate sections, said intermediate sectioncomprising a flexible metallic plate portion clamped between the innerand outer sections\ and projecting away from the sides of the latter tooverlap said surfaces and comprising a metallic sealing portionextending inwardly from said plate portion adjacent the margin of thelatter and adapted to engage said surface, and adjustable presser meansmounted on said support and adapted to act between it and said plateportion at points adjacent, and distributed along the length of, saidmargin to press said sealing por tion against said surface.

4. A plug door for a horizontal oven chamber having a door opening, anda sealing surface at the margin of said opening, said door comprising anouter supporting body formed by a rigid plate having its edges bentoutwardly, an inner door part of refractory material, supporting meansfor said refractory material fixed to said supporting body, a flexiblemetallic frame clamped between said supporting body and said inner doorpart and having sealing means at its margin, and presser screws mountedin, and distributed along the outer edge of said supporting body andadapted to act upon the outer edge of said flexible frame to press saidsealing portion against said surface.

5. A plug door for a horizontal oven chamber with a door opening and asealing surface surrounding said opening and adjacent the marginthereof, said door comprising a rigid outer section, an inner plugsection of refractory material, supporting means for saidrefractorymaterial comprising metallic parts secured to said outersection, an intermediate sealing section comprising a flexible metalplate portion clamped between said supporting means and said outersection and projecting away from the latter to overlap said surface andcomprising a metallic sealing portion extending inwardly from said plateportion adjacent the margin of the latter and adapted to engage saidsurface, and adjustable pressing means mounted on said support andadapted to act between it and said plate portion at points adjacent, anddistributed along the length of, said margin, to press said sealingportion against said surface.

6. A self sealing door for a horizontal coke oven chamber which has adoor opening and a sealing surface at the margin of said opening, saiddoor comprising an inner plug portion of refractory material, an outermetallic portion including sealing means, and including a metallic partextending beneath and supporting the weight of said plug portion, and avertical metallic member embedded in said refractory material andconnected at different levels to said outer metallic portion, saidsealing means comprising a flexible metallic web portion at the outerside of said plug portion and projecting laterally therefrom andcomprising a metallic portion carried by said web portion at the marginof the latter and adapted to engage said sealing surface when said plugportion is entered in said door opening, and said refractory materialbeing exposed to the interior of the oven chamber at the side edges ofsaid plug section for substantially the full horizontal extent of saidedges along the major portion of the vertical extent of said plugsection.

7. A self sealing door for-a horizontal coke oven chamber which has adoor opening and a sealing surface at the margin of said opening, saiddoor comprising an inner plug portion of refractory material, an outermetallic portion including sealing means, and including a metallic partextending beneath and supporting the weight of said plug portion andincluding vertical parts at the opposite sides of a relatively shortlower portion of said plug section, a vertical metallic member embeddedin said refractory material and connected at different levels to saidouter metallic portion, said sealing means comprising a flexiblemetallic-web portion at the outer side of said plug portion andprojecting laterally therefrom and comprising a metallic portion carriedby said web at the margin of the latter and said refractory materialbeing exposed to the interior of the oven chamber at the side edges ofsaid plug section for substantially the full horizontal extent of saidedges along the vertical 5 extent of the plug section except for theportions of said edges alongside said vertical parts.

8. A self sealing door for a coking chamber which has a door opening anda sealing surface at the margin of said opening, said door comprising aninner plug section of refractory material,

a metallic outer frame section, a flexible metallic plate interposedbetween said frame and plug sections and having a marginal portionprojecting laterally away from the edge of said plug section,

metallic sealing means carried by said plate adjacent its margin andextending inwardly from said plate and adapted to engage said sealingsurface when said plug section is entered in said door opening, meansproviding a hinged connection between said frame section and plateadjacent their upper ends with the-hinge axis of said connectionhorizontal and parallel to said plate, a metallic part connected to thelower portion of said plate and extending away from the inner side ofthe latter beneath said plug section and supporting the weight of thelatter, means including a vertical bar connected to said plate atdifferent levels and embedded in said refractory material formaintaining the latter in spaced relation with said plate, andadjustable said surface. I

9. A self sealing door for a coking chamber which has a door opening anda sealing surface at the margin of said opening, said door comprising aninner plug section of refractory material, a

0 metallic outer frame section, a flexible metallic plate interposedbetween said frame and plug sections and having a marginal portionprojecting laterally away from the edge of said plug section, metallicsealing means carried by said plate adjacent its margin and extendinginwardly from said plate and adapted to engage said sealing surface whensaid plug section is entered in said door opening, a metallic partconnected to the lower portion of said plate and extending horizontallyaway from the inner side of the latter beneath said plug section andsupporting the weight of the latter, means including a vertical barconnected to said plate at different levels and embedded in saidrefractory material for maintaining the latter in spaced relation withsaid plate, and adjustable presser means mounted on said frame sectionand adapted to act between it and said plate at points adjacent anddistributed along the length of, said margin to press said sealing meansagainst said surface, and means providing a connection between saidframe section and plate through which the latter is supported by saidframe section with freedom for horizontal movement toward and away fromthe section of the said points of said plate, said refractory materialbeing exposed to the interior of the oven chamber at the side edges ofsaid plug section for substantially the full horizontal extent of saidedges along the major portion of the vertical extent of said plugsection. V

10. A self sealing door for a horizontal coke oven chamber which has adoor opening and a sealing surface at the margin of said opening, saiddoor comprising an inner plug portion of refractory material, an outermetallic portion including sealing means, and including a metallic partsupporting the weight of said plug portion and of a vertical extentwhich is a small fraction only of the vertical extent of the plugsection of the door and a vertical metallic member embedded in saidrefractory material and connected at different levels to said outermetallic portion, said sealing means comprising a flexible metallic webportion at the outer side of said plugportion and projecting laterallytherefrom and adapted to engage said sealing surface when said plugportion is entered in said door opening, and said refractory materialbeing exposed to the interior of the oven chamber at the side edges ofsaid plug section for substantially the full horizontal extent of saidedges along the major portion of the vertical extent of said plugsection, whereby the transfer of heat from the inner side of said plugsection through the latter to the outer portion of the door is maderelatively small.

W. BEIMANN.

